California native Mika Kruse played in Major League Rugby between 2018-2025. He represented the Glendale/Colorado Raptors (2018-2020), the Utah Warriors (2021-2024), and the Seattle Seawolves (2025).

Kruse played 5 years of high school rugby while attending Bullard High School in Fresno, CA, and was named a High School All-American, at which time he played fly-half. Kruse joined the Glendale Merlins in 2017 that served as the academy side for the Glendale Raptors during the early years of MLR. Kruse earned 19 appearances for the Raptors between 2018-2020, and was included in the USA Rugby Selects squad for the 2018 Americas Pacific Challenge after his first season in MLR, that led to his inclusion in the USA Eagles training squad for the 2018 Autumn Tests, though he would have to wait for his test debut.

Following the withdrawal of the Raptors and ahead of the 2021 MLR season, Kruse joined the Utah Warriors where he earned 51 MLR appearances over 4 seasons between 2021-2024, scoring 18 tries. Kruse finally earned his test debut for the USA as Eagle #538 on 4th July 2021, against England at Twickenham. Kruse also had the chance to play alongside his younger brother Isaia following the latter’s drafting in 2023. As of the conclusion of the 2024 season, Kruse sits as MLR’s 8th highest try scorer on 26.

On October 2nd, 2024, Kruse was included in a group of 17 players that the Utah Warriors announced would not be returning as for the 2025 season. The following day, the Seattle Seawolves announced that they had signed Kruse for their 2025 campaign.